Permanent magnet variable frequency air compressor fails to start

Common reasons why the variable frequency air compressor cannot start normally;

first, if the contactor is not closed, it is mainly the electrical cause of the air compressor

(1) First check whether the power supply of the air compressor is connected correctly, whether the power switch is closed, whether the power fuse is blown, and whether the power supply voltage reaches more than 90% of the rated voltage.

(2) Check whether the components of the air compressor power supply pressure relay are damaged and whether the given value of the pressure relay is appropriate.

(3) Check whether the working medium in the temperature sensor of the air compressor thermostat leaks, whether the parts of the controller are damaged, and whether the temperature indication position is adjusted correctly.

2., if the contactor has been closed and the inverter air compressor cannot be started, it is likely that the motor fails or the air compressor has a mechanical failure;

(1) Check whether the phase sequence of the motor wiring is correct, and use a multimeter to test whether the motor winding is short-circuited or open.

(2) Check whether the running parts of the air compressor are stuck on the shaft due to insufficient lubrication or too small clearance. If there is a phenomenon of holding the shaft or sticking the cylinder, the impurities in the lubricating oil should be removed, the new lubricating oil should be replaced, and the oil path should be smooth.